A display device includes: a display module; a storage module storing state setting information indicating whether setting of a power consumption state of the display module has been completed; an information readout module reading out the state setting information from the storage module at startup of the display module; a decision module deciding to set the power consumption state of the display module when the readout state setting information indicates non-setting; a display instruction module causing the display module to display a screen for setting the power consumption state in response to the decision to set the power consumption state; an input module inputting information for setting the power consumption state based on the screen displayed in the display module; and a state setting module setting the power consumption state based on the information inputted by the input module.